Resinous compound.



STATES PATENT OFFICE.

Roms WIITPPLE, on NEW YORK, N. Y., assionon 'ro STANDARD CHEMICAL COMPANY,

or BAYONNE, NEW JERSEY, A conrom'rxon or NEW JERSEY. v

nnsmous oomrouur.

Io Driving.

Specification of Lettors Patent.

Patented Dec. so, 1913.

. ipp'lisationfiled'fluvember 6, 1908. Serial Zia-526$.

To all whom it may concern Beit known "that i, Dorris wmm, citizen of the United States, residing at New a York, in the coimty of New York and State of New York, have invented new and useful Improvements in Resinous Compounds, of

- which the followingis a specification.

dization, andv possesses a high electric re-.

sistance factor. Each of said-products is admirably adapted as an insulating medium for electrical cables and the like, and it is found that a combination ofthe two new products, which for convenience is' designated insuline resin, and insuline oil, respectively, is especially well adapted as an" insulating medium in cases where the high fluidity of the oil alone on one hand, and the gummy character of-the resin on the other would render the application of the products individually unsatisfactory.

The present invention therefore contemplates the provision of an insulating compound including both insuline resin and insuline oil with or without additional ingredients.

To produce the insuline resin, any resin which consists essentially of abietic anhydrid or abietic acid, preferably rosin, is heated in an iron still :to a temperature of approximately 135 0., and the molten mass blown with moist air for the purpose of oxidizing the abietic' acid until the contents of the still show a high percentage of tetraabietic acid. After the foregoing operation has been conducted for the necessary period .of time, determined by the specific tests deproduct is my improved insuline resin, which is in" the form of a soft, gummy material,

having a specific gravity of .98, which melts at a temperature ab0ut20 (1., lower than the melting point-of the rosin from which it was made, which is less soluble in petroleum spirits than resin and is freely soluble in petroleum oils, is non-drying, is incapable of further oxidization, and retains its soft and plastic condition indefinitely; is free from carbonaceous particles and contains no rosin oil, no pinene derivatives, and no volatile or anicucids.

o produce insuline oil, rosin in appropriate quantities is heated in an iron still to a temperature of 150 to 200 C., and untilthe distillate begins to show the presence of resinior resin hydrocarbons. The temperature is then raised to substantially 250 C.,- and air which has been saturated with watery vapor at approximately 100 0., is passed through the heated mass in the still to drive off any remaining volatile constituents and to furnish the necessary oxygen or hydroxyl groups to the resin. The cover of the still is then tightly fitted and the temperature' raised to approximately 360 C. to break up the oxygenated resin into lower homologues which constitute oxygenated resin oil. The distillate from this operation is again introduced into the still and blown with dry air at a temperature of approximately 150 C., to drive 01f the turpentine products resulting from the next preceding operation, which effect is indicated by the absence of turpentine oils or vapors in the distillate. The residual oil is now subjected to a temperature-of approximately 320 (1., and the first portion of the distillate is rejected, while the remaining portion is collected and the distillation carried on until the carbonization point is reached. This final distillate is the new insuline oil, which is found to be an oxygenated resin oil, to wit: a saturated oil having all its bonds satisfied or saturated with hydroxyl or oxy gen, which is incapable of further oxidization under any conditions of heat, light, and moisture that are encountered when the material is applied to the purposes for which it is intended, is non-drying, limpid and slightly fluorescentin appearance: cannot be 105 ,resin oil or vegetable oils.

By mixing regulable portions of insuline resin and'insuline oil hereinbefore described, an insulating compound of any desired degree of plasticity or fluidity may be produced without materially effecting the high insulating capacity of either of the constituents. For example, should it be found desirable to produce an insulating medium to saturate the paper sheathing for an electrical cable, the oil and the resin would be mixed in such proportions that the resultant compound would flow freely enough to thoroughly impregnate the paper. On the other hand should the compound be intended for use in connection with a textile or fibrous wrapping or sheathing of the cable, it is obvious that the compound should preferably possess somewhat high viscosity, and to effect this result a larger proportion of the resin would be employed. In any event the oil and resin may be freely combined in pro portions best suited to the particular conditions under which the insulating material is to be applied and employed.

While the compound consisting of the insuline oil and insuline resin, hereinbefore described, is in itself admirably adapted to The compound alone or in admixture with other insulating media may be applied to the insulating sheath of cables and the like by any improved method, either as a mass filling between the exterior sheath and the cable proper, or as an impregnating medium for the windings or wrappings for the cable.

What I claim is:

An insulating compound comprising a resin derivative in the form of a soft, nondrying, non-oxidizing permanently plastic mass, and a resin oil in the form of a nonoxidizing, non drying, non saponifiable resin derivative,

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

DORRIS WHIPPLE. Witnesses MERLE L San. JOHN, Hnnnmcrr Eu REESE, 

